Right, but it's the converse that is the issue: Americans wanting to do jobs that aren't found (or only found in a limited way) in America. Trump also supports them. The intent is to see things like manufacturing jobs happen more often on American soil so that Americans can do those jobs.

> Is that really a passion for many people, working on an assembly line?

The idea of it is, at least. I know a lot of people who have impressive manufacturing facilities in their garages just to support it as a hobby. Manufacturing is clearly a relatively common passion. You may have a point that they might come to hate the work if it became their daily reality, but the emotions that drive this sort of thing are never grounded in logic. Besides, it is not like they love the burgers they are flipping right now.